Cause : Communications error comes when a CAN communications error has occurred due to wiring or incorrect parameters.

Fault value (r0949, interpret decimal):
1: The error counter for the send telegrams has exceeded the BUS OFF value 255. The bus disables the CAN controller.
- bus cable short circuit.
- incorrect baud rate.
- incorrect bit timing.

2: The master no longer interrogated the CAN node status longer than for its "life time". The "life time" is obtained from the "guard time" (p8604[0]) multiplied by the "life time factor" (p8604[1]).
- bus cable interrupted.
- bus cable not connected.
- incorrect baud rate.
- incorrect bit timing.
- master fault.

• check the bus cable.
• check the baud rate (p8622).
• check the bit timing (p8623).
• check the master.
  The CAN controller must be manually restarted with p8608 = 1 after the cause of the fault has been resolved